Abstract
In order to reveal the effect of the vehicle-track vertical coupling vibrations on the frame-mounted traction motor dynamics, a vehicle-track vertical coupling dynamic model with considering the influence of the frame-mounted traction motor is established, and the correctness of the model is verified by real vehicle test. In case of the investigated vehicle model, the influences of the vehicle-track vertical coupling vibrations and the suspension parameters on the frame-mounted traction motor dynamics are discussed. The results show that the traction motor is significantly affected by the train system, when the motor is equivalent to the bogie frame mass, the phenomenon of underestimation exists to evaluate the vibration of the motor. In addition, suspension parameters have a great impact on the traction motor dynamics, rational selection suspension parameters can help to attenuate the vibration of the traction motor, and alleviate uneven the distribution of the air gap magnetic field of the traction motor.
Highlights
Finding out the vibration mechanism of each subsystem is the key to ensure the safety and smooth operation of trains, and is the premise of the design of railway vehicles’ main components [1, 2]
In this paper, according to the structural characteristics of a train with frame-mounted traction motor, a vehicle-track vertical coupling dynamic model with considering the influence of the frame-mounted traction motor is established. By considering both the track irregularity excitation and the traction motor vibration characteristics, the vertical vibration responses of the train with frame-mounted traction motor are simulated, and the correctness of the dynamic model established is verified by the real vehicle test
In order to find out the influences of the vehicle-track vertical coupling vibrations on the frame-mounted traction motor dynamics, by using the dynamic model established in Section 2, taking the high-speed train described in Section 3 as an example, the vertical vibration responses of the train with or without frame-mounted traction motor under the excitation of track irregularity shown in Eq (23) are analyzed
Summary
Finding out the vibration mechanism of each subsystem is the key to ensure the safety and smooth operation of trains, and is the premise of the design of railway vehicles’ main components [1, 2]. In this paper, according to the structural characteristics of a train with frame-mounted traction motor, a vehicle-track vertical coupling dynamic model with considering the influence of the frame-mounted traction motor is established. In case of the investigated vehicle model, the influences of the vehicle-track vertical coupling vibrations and the suspension parameters on the frame-mounted traction motor dynamics are discussed. The research made in this paper can provide an effective model reference for the analysis of the dynamic characteristics of the frame-mounted traction motor and the optimization design of the motor suspension parameters. Vehicle-track vertical coupling dynamic model with considering the frame-mounted traction motor
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